Scattered power from non-thermal, F-region plasma observed by EISCAT - Evidence for coherent echoes?

Details Scattered power from non-thermal, F-region plasma observed by EISCAT - Evidence for coherent echoes? Scattered power from non-thermal, F-region plasma observed by EISCAT - Evidence for coherent echoes?

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..467l&link_type=abstract

(EISCAT Scientific Association, International EISCAT Workshop, 3rd, Bad Lauterberg, Federal Republic of Germany, Mar. 23-27, 198

Physics

16

Coherent Scattering, Eiscat Radar System (Europe), F Region, Plasma Dynamics, Radar Echoes, Incoherent Scattering, Ion Temperature, Ionospheric F-Scatter Propagation, Monte Carlo Method, Polar Regions

Scientific paper

Three rapid, poleward bursts of plasma flow observed by the UK Polar EISCAT experiment are studied. The large ion velocities (greater than 1 km/s) are shown to drive the ion velocity distribution into non-Maxwellian form. The total scattered power is shown to rise with apparent ion temperature by up to 6 dB more than is expected for an isotropic Maxwellian plasma of constant density and by an even larger factor than expected for nonthermal plasma. The anomalous increases in power are observed only at altitudes below 300 km. At higher altitudes the rise in power is roughly consistent with that simulated numerically for homogeneous, anisotropic, non-Maxwellian plasma of constant density. The spectra at times of anomalously high power are found to be asymmetric, showing an enhancement near the downward Doppler-shifted ion-acoustic frequency. It is suggested that the data may be explained by some form of coherent echo contamination of the incoherent scatter spectrum.

Affiliated with

Also associated with

No associations

Rating

Scattered power from non-thermal, F-region plasma observed by EISCAT - Evidence for coherent echoes? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Scattered power from non-thermal, F-region plasma observed by EISCAT - Evidence for coherent echoes?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scattered power from non-thermal, F-region plasma observed by EISCAT - Evidence for coherent echoes? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-854996